package com.health.commons;

import java.security.MessageDigest;

public class MD5Encrypt {
	public MD5Encrypt() {
	}

	private final static String[] hexDigits = { "0", "1", "2", "3", "4", "5", "6"
		, "7", "8", "9", "A", "B", "C", "D", "E", "F" };

	/**
	 * 字节数组转换为16进制串
	 * 
	 * @param b
	 *            
	 * @return 16进制串
	 */
	public static String byteArrayToString(byte[] b) {
		StringBuffer resultSb = new StringBuffer();
		for (int i = 0; i < b.length; i++) {
		 
			resultSb.append(byteToHexString(b[i])); 
		}
		return resultSb.toString();
	}

	private static String byteToNumString(byte b) {
		int _b = b;
		if (_b < 0) {
			_b = 256 + _b;
		}
		return String.valueOf(_b);
	}

	private static String byteToHexString(byte b) {
		int n = b;
		if (n < 0) {
			n = 256 + n;
		}
		int d1 = n / 16;
		int d2 = n % 16;
		return hexDigits[d1] + hexDigits[d2];
	}

	public static String MD5Encode(String origin) {
		String resultString = null;
		try {
			resultString = new String(origin);
			MessageDigest md = MessageDigest.getInstance("MD5");
			resultString = byteArrayToString(md.digest(resultString.getBytes()));
		} catch (Exception ex) {
			ex.printStackTrace();
		}
		return resultString;
	}

	public static void main(String[] args) {
		System.out.println(MD5Encrypt.MD5Encode("depadmin123!@#"));
		System.out.println();
		System.out.println(MD5Encrypt.MD5Encode("123456"));
	}

}
